Water-tube boiler



(No-Model.) 2 Sheets-Sheet 1.

W. OOWLES. WATER TUBE BOILER. No. 508,410. Patented Nov. 14, 1893.

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(No Model.) 2 Sheets-Sheet 2.

W. OOWLES. WATER TUBBBOILER.

No. 508,410. Patented Nov. 14, 1893.

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Nt-TED STATES PATENT FFICE.

WILLIAM co mute, on BROOKLYN, NEW YORK, ASSIGNOR To JOHN I. EASTMAN, orPHILADELPHIA, PENNSYLVANIA.

WATER-TUBE' BOlLER.

SPECIFICATION formingpart of Letters Patent No. 508,410, dated November14, 1893.

Application filed December 28, 1892- Serial No. 456,525- (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM CoWLEs, of Brooklyn, county of Kings, andState of New York, have invented a certain new and uselower portion ofthe structure, and a steam drum or drums, located of the structure.

The object of this invention is to improve the general construction ofthe boilers of-this type disclosed in my Patents No. 369,545 of January22, 1889; No. 465,163 of December 15, 1891, and No. 465,164 of December15, 1891.

The invention consists more especially of the arrangement of two sidedrums connected with a main steam drum, in which provision is made forseparating the steam from the water as it passes from the main drum tothe side drums, and whereby the dry steam is taken from the front end ofthe steam drum to therear end of each side drum, and escapes at the topfront ends of the side drums, thus causing the steam to flowhorizontally throughout the full length of the steam and side drums; andit further consists inthe arrangement of a casing between the ash pitand soot pit, so that the cross over or equalizing pipe arranged betweenthe two water drums, is removed fromthe direct heat of the soot pit; andit further consists in the drains for the side drums to downcast pipesdirect.

I will describe a boiler embodying my improvement, and then point outthe novel features in claims.

In the accompanying drawings, Figure 1 is a front view partly insection, of a steam boiler, embodying my improvement, and Fig. 2 is alongitudinal vertical section thereof taken through the center of Fig.1.

Referring by letter to the drawings, A designates the main steam drum,extending the full length of the structure, and supported by the tubesWithin the Walls or casing A, in the usual manner. The steam drum A isproat the upper portion vided with the usual man-hole for the ,pur-

pose of cleaning.

B designates side drums for receiving dry steam from the drum A. As hereshown, the connection between the drums B and the drum A, consists ofpipes A which extend, at one end, through the shell plate of the drum A,and have secured to them longitudinally extending dry steam pipes Aclosed at the free end, but having a series of slots or openings at, atsaid free end. Obviously, the steam from the drum A will pass throughthese pipes A in a substantially dry condition.

It will be seen that the side drums B extend only a portion of thelength of the steam drum A and are located in the forward upper portionof the structure. They are connected one with the other by means of asuitable steam pipe, and both are provided with an exit a for steam. Thespace H constitutes a furnace, located below the steam drums, abovementioned, and is provided with the usual grate bars H and with doors HLocated within the furnace, at the rear lower portion thereof are Waterdrums D, which extend longitudinally of the structure, one on each sidethereof.

The Water drums D are connected to the main steam drum A, by means ofcirculating tubes, or nest tubes E, which, in the main, extendvertically,'but are suitably turned at the ends to connect with saiddrums, as shown; Other circulating tubes or furnace tubes E extend fromthe lower portion of the steam drum A, to manifolds or side pipes L,extending horizontally within the ash pit below the grate bars H, andwhich are connected one with the other, by means of a cross-pipe Fhaving a sediment blow-off s.

Down-cast pipes F, form a connection between the steam drum A and themanifolds L, and smaller pipes F lead from the forward ends of the sidedrums B into the down-cast pipes, thus providing drain pipes from thelower portion of the drums B, and each of these drain pipes may beprovided with a check valve to prevent water from being drawn up bysudden opening of stop valve, or increase in generation and flow ofsteam. A

feed pipe 'n also leads into one of the downcast pipes. The Water drumsD have a connection a with the cross-over pipe F. It will be seen, bythis construction, that there is a complete and constant circulation ofwater from the water drums D through pipes E to the drum A, and from themanifoldsL through pipes E to the drum A, and through the downcast pipesF, and that the pipes E E are wholly exposed to the action of the heatin the furnace.

G is a soot pit arranged across the lower rear portion of the structureand having a wall G between it and the ash pit, and an inclined wall Gconnecting the upper edge of the wall G to the bridge wall G The crosspipe F is arranged between the ash pit and soot pit, so that it isentirely removed from the fire and the heat of the soot pit.

Bafile plates gare placed in the steam drum A over the mouths of thecirculating pipes E and consist of metal plates secu red in an inclinedposition so as to deflect the water downward and to allow the steam toescape upward.

Having described my invention, what I claim is- 1. In a steam boiler,the combination with the circulating tubes, substantially such asdescribed, of the main steam drum, the drums arranged at the sidesthereof, and the connections between said steam drum and the side drumscomprising pipes arranged longitudinally in the steam drum and havingslots or similar openings near the end, substantially as specified.

2. In a steam boiler the combination with the circulating tubes, of themain steam drum, the drums arranged one on each side of said steam drum,an exit for steam at the forward ends of said side drums, connectionsbetween the rear ends of said side drums and the steam drum and drypipes extending from said connections longitudinally within the steamdrum to near its front end, and having slots or similar openings forsteam near its free end, substantially as specified.

3. The combination with the steam drum and the two side drums havingconnection therewith, of the water drums, a series of circulating tubesleading from each water drum to the rear portion of the steam drum, themanifolds and the circulating tubes leading from said manifolds to thesteam drum, substantially as specified.

4. The combination with a furnace, of the steam drum arrangedhorizontally in the upper portion thereof, the two drums arranged in theupper portion of the furnace at the sides of the steam drum, the twowater drums arranged in the rear lower portion of the furnace, themanifolds arranged within the ash pit and the sets of circulating tubesconnecting said water drums and manifolds with the steam drum,substantially as specified.

5. The combination with the manifolds, the steam drum, the side drumshaving the connections with the steam drum, and the circulating tubesall arranged substantially as described, of the down-cast pipes leadingfrom the steam drum, and the drain pipes leading from the side drums tothe down-cast pipes, substantially as specified.

(5. The combination with the manifolds, the steam drum, the side drumshaving the connections with the steam drum, and the circulating tubes,of the down-cast pipes leading from the steam drum, with drain pipesleading from the side drums to the down-cast pipes and the check valvesin said drain pipes, substantially as specified.

'7. The combination with the furnace having the grate bars and the ashpit, of the soot pit, the walls G, G separating said two pits, the saidwall G being inclined and connecting with a bridge wall and thecross-over pipe arranged adjacent to said wall G below the wall G2 inthe ash pit, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM COWLES.

Witnesses:

CLARENCE R. FERGUSON, NOEL GALE.

